Canon imageFORMULA DR-7090C Reference Manual page 58

14.
Attach the cleaning paper to the scanning area
cleaning tool.
15.
Open the inner cover.
50
16.
Wipe the platen roller located behind the inner cover
with a cloth moistened with plain water and
thoroughly wrung out. Next, wipe the roller with a soft,
dry cloth.
IMPORTANT
When cleaning the platen roller, rotate the roller slowly while
wiping it.
Platen
Roller
17.
Clean the feeder's scanning area along the rail.